bgp aggregrate vs routemap

jemekeren · ‎04-17-2007

hi there what is the pros and contras when we use summary adverisement using the aggregrate command vs route-map. i usually use route-map and create summary route using static route via null0 then link it to neighbor command. could aggregate do the same? and should i move to this aggregrate command because there exists another benefits we will get? tx for explanation :)

Harold Ritter · ‎04-18-2007

Jimmy,

Generating an aggregate route using the aggregate-address command or via a network statement is functionally equivalent.

The advantage I see is that using a static route and a network statement is more stable, less incline to flap.

Bear in mind that you have to have a more specific prefix already present in BGP for the aggregate-address command to generate a summary route.

Hope this helps,

Harold Ritter
Sr Technical Leader
CCIE 4168 (R&S, SP)
harold@cisco.com
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